Finding the Third Proportional to 8,499,477 and 12,820,374

Step by Step Solution

1. Step 1: Write the proportion equation
   8,499,477 : 12,820,374 = 12,820,374 : x
2. Step 2: Convert to fraction form
   8,499,477/12,820,374 = 12,820,374/x
3. Step 3: Cross multiply
   8,499,477x = 12,820,374 × 12,820,374
4. Step 4: Simplify right side
   8,499,477x = 164,361,989,499,876
5. Step 5: Solve for x
   x = 164,361,989,499,876/8,499,477
6. Step 6: Final answer
   x = 19,337,894.50